Nigricans, a Latin word meaning black, may refer to: Acanthosis nigricans, a brown to black, poorly defined, velvety hyperpigmentation of the skin Ulmus americana 'Nigricans', an American elm cultivar Ulmus glabra 'Latifolia Nigricans', a wych elm cultivar a cultivar of Pittosporum tenuifolium, a small evergreen tree native to New Zealand